Fix crash when teleporting near unknown node

diff --git a/builtin/chatcommands.lua b/builtin/chatcommands.lua
index 03c278d4d919df4fec29e6bda1a249a4f8abefbb..f8df83d8e2a8bef9fba33d79517d16ead48a1843 100644 (file)
--- a/builtin/chatcommands.lua
+++ b/builtin/chatcommands.lua
@@ -261,9 +261,12 @@ minetest.register_chatcommand("teleport", {
                        }
                        for _, d in ipairs(tries) do
                                local p = {x = pos.x+d.x, y = pos.y+d.y, z = pos.z+d.z}
-                               local n = minetest.get_node(p)
-                               if not minetest.registered_nodes[n.name].walkable then
-                                       return p, true
+                               local n = minetest.get_node_or_nil(p)
+                               if n and n.name then
+                                       local def = minetest.registered_nodes[n.name]
+                                       if def and not def.walkable then
+                                               return p, true
+                                       end
                                end
                        end
                        return pos, false